TASK: Add php 8 to test matrix

Author: mficzel

.github/workflows/build.yml

@@ -14,7 +14,10 @@ jobs:
             fail-fast: false
             matrix:
                 php-versions: ['7.3', '7.4']
-                neos-versions: ['5.3', '7.0', '7.1']
+                neos-versions: ['5.3', '7.0', '7.2']
+                include:
+                  - php-versions: '8.0'
+                    neos-versions: '7.2'
 
         runs-on: ubuntu-latest